Analyses indicated that varying the range of test stimuli changes the discriminability of the stimuli within that range, even though the physical differences among these stimuli remain constant. (Author)

Article attempts to provide guidelines for a systematic approach in dealing with position biases in order to improve the adequacy of decisions about hypothetical statements. (MB)

This study tested 5- and 8-year-olds and adults in a bisection task with a sequence of stimuli in which time and number co-varied. Findings indicated that the number of stimuli interfered with 5-year-olds' performance on the temporal bisection task. Number interference decreased both with age and counting strategy. In the numerical bisection task,…

Attempted to maximize the efficacy of time-delay discrimination training of 16 preschoolers. No indications were found of effects of precision response pretraining on the outcome of time delay of static cues. Transfer and lack of transfer of stimulus control were associated with nonshifts and shifts of response loci, respectively. (RH)

Two experiments utilized procedures to teach to discriminate between the letters b and d as part of pre-reading training. (Author)

This study attempted to determine the functional components of rehearsal strategies in children's discrimination learning. When a discrimination list was given without rehearsal instructions, ability to discriminate situational frequencies predicted performance. Without rehearsal strategy, subjects' ability to discriminate between previous usage…

The effects of meaningfulness of the stimulus materials and the presence or absence of contextual cues on problem-solving behavior were investigated. Third-graders (N=80) were randomly assigned to one of four conditions and their performance in a series of discrimination problems was observed. Subjects in Conditions I and II responded to stimuli…

Research on the acquisition of sight reading vocabulary by learning disabled (LD) and normal children is reviewed. Studies are explained to have measured the effects of such variables as mode of presentation, amount of practice, and redundancy. Reported is the general conclusion that LD children do not perform as well as normal children on the…

Human recognition behavior is influenced by the phenomenon of shape constancy, which occurs when the shape of an object is correctly perceived regardless of the orientation of the object in space. The research reported here tests the validity of the shape-slant invariance hypothesis, a theoretical formulation of the phenomenon of shape constancy.…